I think the white is too light, if you understand what I'm saying. It's black paint, but the paint is not evenly applied, nor is it very thickly applied, and the other shades of original camo are showing through.
So the ligher colors are just the grey camo showing through, while the darker are the green camo NOT showing through so much.
Every try painting a solid black coat of paint on something primed in lighter color? Oh BOY it takes craploads of paint to get a solid black. Same principle here.
Here you can see the old camo patterns showing through on the dorsal spine, nose, and wings. I wouldn't take lighting conditions of the photo to mean they used a light grey, though.